| Name | Meaning | Gender | Origin |
|---|
| Jeremiah | Exalted of the Lord
| Male | Hebrew |
| Jerry Lee | after Jerry Lee Lewis | Unisex | |
| Jesse | wealthy | Male | Hebrew |
| Jesse James | | Unisex | Hebrew |
| Jethro | excellence | Male | Hebrew |
| Jett | Jet Black Gem | Male | English |
| Jim | supplanter | Male | English |
| Jim Bob | | Unisex | Hebrew |
| Jimbo | Supplanter, Representative | Unisex | Hebrew |
| Jimmy | supplanter | Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Johnny | the Lord is gracious | Male | English |
| Judd | praised | Male | Medieval |
| Juice | | Unisex | Hebrew |
| Junior | Youthful person. Used to distinguish son from father where they have the same name | Male | Latin |
| Justin | just, true | Male | Latin |
| Kandy | Cutie
| Male | |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Kenny | English, born of fire, handsome | Male | English |
| Kibbles | | Unisex | Hebrew |
| Kibbles | | Unisex | |
| Lafayette | Hound Dog from the AristoCats
| Male | |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Lee | Healer
| Male | English |